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<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>195341</bug_id>
          
          <creation_ts>2019-03-05 14:45:47 -0800</creation_ts>
          <short_desc>[ iOS Simulator ] REGRESSION (r237087) Layout Test fast/viewport/ios/*-width-viewport-after-changing-view-scale.html is a flaky failure</short_desc>
          <delta_ts>2019-04-02 08:58:25 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Tools / Tests</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Shawn Roberts">sroberts</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>lforschler</cc>
    
    <cc>ryanhaddad</cc>
    
    <cc>thorton</cc>
    
    <cc>webkit-bot-watchers-bugzilla</cc>
    
    <cc>webkit-bug-importer</cc>
    
    <cc>wenson_hsieh</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1512847</commentid>
    <comment_count>0</comment_count>
    <who name="Shawn Roberts">sroberts</who>
    <bug_when>2019-03-05 14:45:47 -0800</bug_when>
    <thetext>The following layout tests are flaky on iOS Simulator

fast/viewport/ios/constant-width-viewport-after-changing-view-scale.html
fast/viewport/ios/device-width-viewport-after-changing-view-scale.html

Probable cause:

Test has been a flaky failure since it was created in r237087

Around revision 240714 I had to add --child-processes 4 to get it to fail, but it produced the same diffs

Reproduced with :

run-webkit-tests fast/viewport/ios/constant-width-viewport-after-changing-view-scale.html fast/viewport/ios/device-width-viewport-after-changing-view-scale.html --iterations 50 -f --ios-simulator --child-processes 4

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&amp;tests=%20fast%2Fviewport%2Fios%2Fconstant-width-viewport-after-changing-view-scale.html%20fast%2Fviewport%2Fios%2Fdevice-width-viewport-after-changing-view-scale.html

Diffs

--- /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/viewport/ios/constant-width-viewport-after-changing-view-scale-expected.txt
+++ /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/viewport/ios/constant-width-viewport-after-changing-view-scale-actual.txt
@@ -1,7 +1,7 @@
 setViewScale(0.50)
-window size: [1280, 2192]
+window size: [640, 1096]
 square size: [128, 219]
-zoom scale: 0.25
+zoom scale: 0.50
 
 setViewScale(0.75)
 window size: [853, 1461]

--- /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/viewport/ios/device-width-viewport-after-changing-view-scale-expected.txt
+++ /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/viewport/ios/device-width-viewport-after-changing-view-scale-actual.txt
@@ -29,9 +29,9 @@
 zoom scale: 1.25
 
 setViewScale(1.00)
-window size: [320, 548]
+window size: [256, 438]
 square size: [32, 55]
-zoom scale: 1.00
+zoom scale: 1.25
 
 setViewScale(0.75)
 window size: [427, 731]</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1512856</commentid>
    <comment_count>1</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2019-03-05 15:00:50 -0800</bug_when>
    <thetext>&lt;rdar://problem/48616298&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1513238</commentid>
    <comment_count>2</comment_count>
    <who name="Ryan Haddad">ryanhaddad</who>
    <bug_when>2019-03-06 15:46:53 -0800</bug_when>
    <thetext>fast/viewport/ios/device-width-viewport-after-changing-view-scale.html  is causing false positives on EWS, so we should do something about this soon.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1513239</commentid>
    <comment_count>3</comment_count>
    <who name="Wenson Hsieh">wenson_hsieh</who>
    <bug_when>2019-03-06 15:48:12 -0800</bug_when>
    <thetext>(In reply to Ryan Haddad from comment #2)
&gt; fast/viewport/ios/device-width-viewport-after-changing-view-scale.html  is
&gt; causing false positives on EWS, so we should do something about this soon.

Understood — I&apos;ll prioritize these tests.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1514263</commentid>
    <comment_count>4</comment_count>
    <who name="Ryan Haddad">ryanhaddad</who>
    <bug_when>2019-03-08 16:54:14 -0800</bug_when>
    <thetext>(In reply to Ryan Haddad from comment #2)
&gt; fast/viewport/ios/device-width-viewport-after-changing-view-scale.html  is
&gt; causing false positives on EWS, so we should do something about this soon.
Marked test as flaky to help out EWS in http://trac.webkit.org/projects/webkit/changeset/242665</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1523327</commentid>
    <comment_count>5</comment_count>
    <who name="Shawn Roberts">sroberts</who>
    <bug_when>2019-04-02 08:58:25 -0700</bug_when>
    <thetext>Marked fast/viewport/ios/constant-width-viewport-after-changing-view-scale.html flaky in https://trac.webkit.org/changeset/243743/webkit while waiting for a fix.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>